EP2109652B1 - Red emitting luminescent material - Google Patents

Red emitting luminescent material Download PDF

Info

Publication number
EP2109652B1
EP2109652B1 EP08709940.4A EP08709940A EP2109652B1 EP 2109652 B1 EP2109652 B1 EP 2109652B1 EP 08709940 A EP08709940 A EP 08709940A EP 2109652 B1 EP2109652 B1 EP 2109652B1
Authority
EP
European Patent Office
Prior art keywords
systems
material
light emitting
emitting device
lighting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08709940.4A
Other languages
German (de)
French (fr)
Other versions
EP2109652A1 (en
Inventor
Peter J. Schmidt
Walter Mayr
Jörg Meyer
Wolfgang Schnick
Cora Sieglinde Hecht
Florian Stadler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lumileds Holding BV
Original Assignee
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Lumileds LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Priority to EP07101811 priority Critical
Application filed by Philips Intellectual Property and Standards GmbH, Koninklijke Philips NV, Lumileds LLC filed Critical Philips Intellectual Property and Standards GmbH
Priority to EP08709940.4A priority patent/EP2109652B1/en
Priority to PCT/IB2008/050361 priority patent/WO2008096300A1/en
Publication of EP2109652A1 publication Critical patent/EP2109652A1/en
Application granted granted Critical
Publication of EP2109652B1 publication Critical patent/EP2109652B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39387316&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2109652(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7706Aluminates; Silicates
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/597Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon oxynitride, e.g. SIALONS
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7728Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals comprising europium
    • C09K11/7734Aluminates; Silicates
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L33/00Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50Wavelength conversion elements
    • H01L33/501Wavelength conversion elements characterised by the materials, e.g. binder
    • H01L33/502Wavelength conversion materials
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3213Strontium oxides or oxide-forming salts thereof
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3852Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3865Aluminium nitrides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3852Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3873Silicon nitrides, e.g. silicon carbonitride, silicon oxynitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40Metallic constituents or additives not added as binding phase
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40Metallic constituents or additives not added as binding phase
    • C04B2235/401Alkaline earth metals
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5409Particle size related information expressed by specific surface values
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5445Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 micron
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54Particle size related information
    • C04B2235/5418Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5454Particle size related information expressed by the size of the particles or aggregates thereof nanometer sized, i.e. below 100 nm
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562Heating rate
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6565Cooling rate
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567Treatment time
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74Physical characteristics
    • C04B2235/77Density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/963Surface properties, e.g. surface roughness

Description

    FIELD OF THE INVENTION
  • The present invention is directed to novel luminescent materials for light emitting devices, especially to the field of novel luminescent materials for LEDs and their use in light emitting devices. The invention also relates to a light emitting device comprising such material and a system comprising light emitting devices.
  • BACKGROUND OF THE INVENTION
  • Phosphors comprising silicates, phosphates (for example, apatite) and aluminates as host materials, with transition metals or rare earth metals added as activating materials to the host materials, are widely known. As blue LEDs, in particular, have become practical in recent years, the development of white light sources utilizing such blue LEDs in combination with such phosphor materials is being energetically pursued.
  • Especially red emitting luminescent materials have been in the focus of interest and several materials have been proposed, e.g. US patent 6680569(B2 ), " Red Deficiency Compensating Phosphor for a Light Emitting Device", or from WO patent application 2005/052087 A1 .
  • US2003/094893 describes an illumination unit having at least one LED as light source, the LED emitting primary radiation in the range from 300 to 570 nm, this radiation being partially or completely converted into longer-wave radiation by phosphors which are exposed to the primary radiation of the LED, in which unit the conversion takes place at least with the aid of a nitride-containing phosphor which emits with a peak emission wavelength at 430 to 670 nm and which originates from the class of the Ce-or Eu-activated nitrides, oxynitrides or sialons.
  • However, there is still the continuing need for red emitting luminescent materials which are usable within a wide range of applications and especially allow the fabrication of phosphor converted (pc) warm white pcLEDs with optimized luminous efficiency and color rendering.
  • SUMMARY OF THE INVENTION
  • It is an object of the present invention to provide a material which is usable within a wide range of applications and especially allows the fabrication of phosphor warm white pcLEDs with optimized luminous efficiency and color rendering.
  • This object is solved by a material according to claim 1 of the present invention.
  • Such a material has shown for a wide range of applications within the present invention to have at least one of the following advantages:
    • Using the material as luminescent material, LEDs may be built which show improved lighting features, especially thermal stability.
    • The material shows for a wide range of applications an exceptional high chemical stability because of the highly condensed nature of the host lattice
    • The material for a wide range of applications only contains non-toxic and widely available constituents
  • Without being bound to any theory, the inventors believe that the improved properties of the inventive material arise at least partially out of the structure of the material.
  • It is believed that the inventive material essentially has an orthorhombic structure which comprises three dimensionally connected SiN4 and AlN4 tetrahedra that are linked via corner and edge sharing. The AlN4 tetrahedra built up trans-edge-connected tetraheda chains running along crystallographic c direction that are crosslinked via comer-connecting SiN4 tetrahedra. This leads to channels along c direction where the M cations are built in.
  • For a wide range of structures within the inventive material there seem exist two crystallographically different "M"-sites (which are within this application called M(1) and M(2)) that are significantly different in size and number of coordinating N ligands. It is believed that red emission especially occurs after excitation of RE incorporated on the smaller M(1) site. Shorter wavelength RE emission resulting from RE on M(2) site may be reabsorbed by RE on M(1) site which then enhances the emission in the red spectral region, e.g. for many structures if RE comprises Eu(II).
  • In addition excitation energy absorbed by RE incorporated on the smaller M(1) site may be transferred to RE on M(1) site by means of energy transfer processes.
  • Because the M(2) site is large(r) and shows a high coordination number, larger M atoms (such as Ba) are preferentially built in on M(2) site, if they are present. Incorporation of such M atoms such as Ba has been shown to lead to a shift of emission to shorter wavelengths and a narrowing of the emission band for a variety of examples within the inventive material.
  • Because the M(1) site is smaller than the M(2) site and shows a low coordination number, smaller M atoms (such as Ca) atoms are preferentially built in on M(1) site. Incorporation of such M atoms such as Ca has been shown to lead to a shift of emission to longer wavelengths and a broadening of the emission band for a variety of examples within the inventive material.
  • Surprisingly as a result, the spectrum may be tuned by adjusting the Ba/Sr/Ca ratio in the lattice.
  • RE comprises Eu. Eu is divalent.
  • According to a preferred embodiment of the present invention, the RE doping level is ≥0.05% and ≤10%.
  • This has been shown to lead to a material with further improved lighting features for a wide range of application within the present invention. Preferably, the doping level is ≥0.2% and ≤3%, more preferred ≥0.75% and ≤2%.
  • According to a preferred embodiment of the present invention, x is ≥0.01 and ≤0.2, preferably ≥0.05 and ≤0.1. This has been found to be advantageous for a wide range of applications within the present invention.
  • Without being bound to any theory, the inventors believe that with an increase of x a so called "flux effect" is also increased, which lowers the reaction temperatures needed to manufacture the inventive material.
  • However, an increase of x is also believed to widen the half-width of the emission band.
  • According to a preferred embodiment of the present invention, the photostability of the material is ≥80%, preferably ≥90%.
  • The term "photostability of X%" means and/or includes that if the material is irradiated with blue light at a flux density of 12 W/cm2 and a phosphor temperature of 260°C, after 1 hour the intensity of luminescence is X% of the initial intensity.
  • The present invention furthermore relates to the use of the inventive material as a luminescent material.
  • The present invention furthermore relates to a light emitting material, especially a LED, comprising at least one material as described above.
  • Preferably the at least one material is provided as powder and/or as ceramic material.
  • If the at least one material is provided at least partially as a powder, it is especially preferred that the powder has a d50 of ≥5 µm and ≤ 15 µm. Here, d50 denotes a particle size, where 50% of the particles have a smaller (or larger) size as the d50-value. This has been shown to be advantageous for a wide range of applications within the present invention.
  • According to a preferred embodiment of the present invention, the at least one material is at least partly provided as at least one ceramic material.
  • The term "ceramic material" in the sense of the present invention means and/or includes especially a crystalline or polycrystalline compact material or composite material with a controlled amount of pores or which is pore free.
  • The term "polycrystalline material" in the sense of the present invention means and/or includes especially a material with a volume density larger than 90 percent of the main constituent, consisting of more than 80 percent of single crystal domains, with each domain being larger than 0.5 µm in diameter and having different crystallographic orientations. The single crystal domains may be connected by amorphous or glassy material or by additional crystalline constituents.
  • According to a preferred embodiment, the at least one ceramic material has a density of ≥90% and ≤ 100% of the theoretical density. This has been shown to be advantageous for a wide range of applications within the present invention since then the luminescence and optical properties of the at least one ceramic material may be increased.
  • More preferably the at least one ceramic material has a density of≥97% and ≤ 100% of the theoretical density, yet more preferred ≥98% and ≤ 100%, even more preferred ≥98.5% and ≤ 100% and most preferred ≥99.0% and ≤ 100%.
  • According to a preferred embodiment of the present invention, the surface roughness RMS (disruption of the planarity of a surface; measured as the geometric mean of the difference between highest and deepest surface features) of the surface(s) of the at least one ceramic material is ≥ 0.001 µm and ≤5 µm.
  • According to an embodiment of the present invention, the surface roughness of the surface(s) of the at least one ceramic material is ≥0.005 µm and <0.8 µm, according to an embodiment of the present invention ≥0.01 µm and ≤0.5 µm, according to an embodiment of the present invention ≥0.02 µm and ≤0.2 µm. and according to an embodiment of the present invention ≥03 µm and ≤ 0.15 µm.
  • According to a preferred embodiment of the present invention, the specific surface area of the at least one ceramic material is ≥10-7 m2/g and ≤0.1 m2/g.
  • A material and/or a light emitting device according to the present invention may be of use in a broad variety of systems and/or applications, amongst them one or more of the following:
    • Office lighting systems
    • household application systems
    • shop lighting systems,
    • home lighting systems,
    • accent lighting systems,
    • spot lighting systems,
    • theater lighting systems,
    • fiber-optics application systems,
    • projection systems,
    • self-lit display systems,
    • pixelated display systems,
    • segmented display systems,
    • warning sign systems,
    • medical lighting application systems,
    • indicator sign systems, and
    • decorative lighting systems
    • portable systems
    • automotive applications
    • green house lighting systems
  • The aforementioned components, as well as the claimed components and the components to be used in accordance with the invention in the described embodiments, are not subject to any special exceptions with respect to their size, shape, material selection and technical concept such that the selection criteria known in the pertinent field can be applied without limitations.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • Additional details, features, characteristics and advantages of the object of the invention are disclosed in the subclaims, the figures and the following description of the respective figures and examples, which --in an exemplary fashion-- show several embodiments and examples of a at least one ceramic material for use in a light emitting device according to the invention as well as several embodiments and examples of a light emitting device according to the invention.
  • Fig. 1
    shows a schematic perspective partial view of a structure of a host material according to a first example of the present invention;
    Fig. 2
    shows the structure of Fig 1 from a further perspective.
    Fig. 3
    shows a schematical view of the M(1)-site in the structure of the host material according to a first example of the present invention;
    Fig.4
    shows a schematical view of the M(2)-site in the structure of the host material according to a first example of the present invention;
    Fig. 5
    shows a diagram of a Measured (above) and calculated (below) XRD pattern of a material according to a second example of the present invention; and
    Fig. 6
    shows a Emission spectrum (450 nm excitation) of a material according to a second example of the present invention;
  • The invention will be further understood by the following Examples I and II which - in a merely illustrative fashion - shows several materials of the present invention.
  • EXAMPLE I
  • Figs. 1 to 4 refer to SrAlSi4N7:Eu(2%) which was made according to the following:
    • SrAlSi4N7:Eu(2%) was prepared by mixing Sr metal powder (0.49 mol, 42.9 g), Eu metal powder (0.01 mol, 1.52 g), Si3N4 (grain size < 500 nm; 0.67 mol, 93.5 g) and AlN (1.0 mol, 41.0 g). The educts are heated in dry N2 atmosphere in tungsten crucibles according to the following heating profile:
      • room temperature →3h→ 1630 °C →5h→ 1630 °C →10h→ 900 °C →45min→ RT
  • After firing, the phosphor powder is milled by ball milling and washed with water.
  • EXAMPLE II
  • Figs. 5 and 6 refer to SrAlSi4N7:Eu(3%) which was made analogous to SrAlSi4N7:Eu(2%) (cf. Example I)
  • Fig. 1 shows a schematic perspective partial view of the host material of the structure of Example I, i.e. SrAlSi4N7, Fig. 2 shows the same structure from another perspective. It can be clearly seen, how the SiN4 and AlN4 tetraeders form lattices.
  • The exact crystal data can be seen in Table I: Table 1: Crystal data of SrAlSi4N7. chemical formula SrAlSi4N7 molar mass / g·mol-1 325.03 crystal system orthorhombic space group Pna21 (No. 33) lattice parameters / pm a = 1174.2(2), b = 2139.1(4), c = 496.6(1) cell volume /106 pm3 1247.2(4) formula units in unit cell 4
  • Fig. 3 and Fig. 4 show the M(1) and M(2)-sites in the material of example I, i.e. SrAlSi4N7:Eu(2%). It can be clearly seen that the two sites are different which has the believed effects as described above.
  • The exact data for the host material (i.e. the undoped SrAlSi4N7) is given in Table II: Table II: atomic distances (pm) between M atoms and N ligands for SrAlSi4N7. Sr1-N1 250.3(5) Sr1-N13 257.1(8) Sr1-N10 263.4(6) Sr1-N13 270.1(8) Sr1-N3 272.3(5) Sr1-N12 314.2(5) Sr2-N12 265.3(7) Sr2-N8 270.9(5) Sr2-N7 271.6(6) Sr2-N11 282.1(6) Sr2-N14 297.9(6) Sr2-N12 301.1(7) Sr2-N5 302.4(6) Sr2-N6 305.7(6)
  • Fig. 5 shows the measured and calculated XRD patterns (Cu-kα radiation) of SrAlSi4N7:Eu (3%) indicating that a nearly phase pure material was prepared.
  • Fig. 6 shows the emission spectrum of SrAlSi4N7:Eu(3%) after excitation at 450 nm. A typical Eu2+ 5d → 4f emission band is observed in the red spectral region.
  • As a comparison the spectroscopic properties of an inventive material is compared with prior art red phosphors in Table III: Table III: Spectroscopic data of inventive and prior art materials. Phosphor Column 1 Column 2 LE (lm/W) Rel. QE450 (%) λmax (nm) FWHM (nm) SrAlSi4N7:Eu (INVENTIVE) 0.636 0.362 177 100% 634 100 (Ba,Sr)2Si5N8:Eu (COMPARISON) 0.613 0.386 242 93% 620 95 CaSiAlN3:Eu (COMPARISON) 0.668 0.332 118 97% 649 98
  • It can be seen that the inventive material shows comparable, sometimes even improved lighting properties as compared with the comparative materials. The value given under column1 and 2 of table III denote the values for the x- and y-color coordinates in the CIE diagram, respectively.
  • A warm white emitting pcLED light source may be built up by combining the inventive material with e.g. a yellow emitting Y3-xAlsO12:Cex color converting material and a blue emitting AlInGaN pump LED.
  • As a further - merely illustrative - example, 10 - 20 wt% of SrAlSi4N7:Eu were mixed with 80 - 90 wt% Y3Al5O12:Ce, suspended in a silicone resin and deposited on top of an AlInGaN LED die emitting at 440 - 460 nm. The composition and thickness of the phosphor layer was adjusted to realize a white pcLED lamp with a correlated color temperature of 3200K.
  • Table IV compares the efficiency and color rendering properties of such a lamp with comparative examples that are built up with prior art red phosphors. It is shown that the claimed phosphor system allows the fabrication of white LED lamps that combine both, a high luminous efficiency and an illumination grade color rendering. Ra is the average color rendering index, R9 is the color rendering index of "red". TABLE IV: Efficiency and color rendering properties Red phosphor component Rel. luminous efficiency Ra R9 SrAlSi4N7:Eu (INVENTIVE) 89% 79 15 (Ba,Sr)2Si5N8:Eu (COMPARISON) 100% 70 - CaSiAlN3:Eu (COMPARISON) 77% 90 70
  • The particular combinations of elements and features in the above detailed embodiments are exemplary only; the interchanging and substitution of these teachings with other teachings in this and the patents/applications incorporated by reference are also expressly contemplated. As those skilled in the art will recognize, variations, modifications, and other implementations of what is described herein can occur to those of ordinary skill in the art without departing from the scope of the invention as claimed. Accordingly, the foregoing description is by way of example only and is not intended as limiting. The invention's scope is defined in the following claims. Furthermore, reference signs used in the description and claims do not limit the scope of the invention as claimed.

Claims (9)

  1. Material of the formula MASi4N7:RE, whereby
    M is selected out of the group comprising Ba, Sr, Ca or mixtures thereof, A is Al, and RE is Eu.
  2. The material of claim 1, whereby the RE doping level is ≥0.05% and ≤10%, and wherein M comprises Sr.
  3. The material of any of the claims 1 to 2, whereby the photostability of the material is ≥80%, preferably ≥90%.
  4. Use of a material according to any of the claims 1 to 3 as a luminescent material.
  5. Light emitting device, especially a LED comprising at least one material according to any of the claims 1 to 3.
  6. The light emitting device of claim 5 whereby the at least one material is provided as powder and/or as ceramic material.
  7. The light emitting device of any of the claims 5 to 6 whereby the powder has a d50 of ≥5 µm and ≤ 15 µm.
  8. The light emitting device of any of the claims 5 to 7, whereby the ceramic has ≥90% of the theoretical density.
  9. A system comprising a material according to any of the claims 1 to 3 and/or a light emitting device according to any of the claims 5 to 8 and/or making use according to Claim 4, the system being used in one or more of the following applications:
    - Office lighting systems
    - household application systems
    - shop lighting systems,
    - home lighting systems,
    - accent lighting systems,
    - spot lighting systems,
    - theater lighting systems,
    - fiber-optics application systems,
    - projection systems,
    - self-lit display systems,
    - pixelated display systems,
    - segmented display systems,
    - warning sign systems,
    - medical lighting application systems,
    - indicator sign systems, and
    - decorative lighting systems
    - portable systems
    - automotive applications
    - green house lighting systems
EP08709940.4A 2007-02-06 2008-01-31 Red emitting luminescent material Active EP2109652B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07101811 2007-02-06
EP08709940.4A EP2109652B1 (en) 2007-02-06 2008-01-31 Red emitting luminescent material
PCT/IB2008/050361 WO2008096300A1 (en) 2007-02-06 2008-01-31 Red emitting luminescent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08709940.4A EP2109652B1 (en) 2007-02-06 2008-01-31 Red emitting luminescent material

Publications (2)

Publication Number Publication Date
EP2109652A1 EP2109652A1 (en) 2009-10-21
EP2109652B1 true EP2109652B1 (en) 2017-10-04

Family

ID=39387316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08709940.4A Active EP2109652B1 (en) 2007-02-06 2008-01-31 Red emitting luminescent material

Country Status (9)

Country Link
US (2) US8153025B2 (en)
EP (1) EP2109652B1 (en)
JP (1) JP2010518194A (en)
KR (1) KR20090128408A (en)
CN (1) CN101631843B (en)
BR (1) BRPI0807118A2 (en)
RU (1) RU2459855C2 (en)
TW (1) TW200902684A (en)
WO (1) WO2008096300A1 (en)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011508001A (en) * 2007-12-19 2011-03-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Red light emitting SiAlON base material
JP4869317B2 (en) * 2008-10-29 2012-02-08 株式会社東芝 Red phosphor and light emitting device using the same
JP4930649B1 (en) 2011-02-25 2012-05-16 三菱化学株式会社 Halophosphate phosphor and white light emitting device
CN102686700B (en) 2010-02-26 2015-03-25 三菱化学株式会社 Halophosphate phosphor and white light emitting device
JP5129283B2 (en) 2010-03-09 2013-01-30 株式会社東芝 Phosphor, phosphor manufacturing method, light emitting device, and light emitting module
JP2011228673A (en) 2010-03-30 2011-11-10 Mitsubishi Chemicals Corp Light emitting device
JP2012046626A (en) * 2010-08-26 2012-03-08 Mitsubishi Chemicals Corp Phosphor and light-emitting device using the same
JP5185421B2 (en) 2010-09-09 2013-04-17 株式会社東芝 Red light emitting phosphor and light emitting device using the same
CN102559177B (en) * 2010-12-28 2014-09-03 北京宇极科技发展有限公司 Nitrogen oxides luminescent material and preparation method thereof and lighting source made of same
RU2470982C2 (en) * 2011-03-02 2012-12-27 Учреждение Российской академии наук Институт химии твердого тела Уральского отделения РАН Complex calcium metasilicate of europium and yttrium, red luminescent material based thereon for ultraviolet light-emitting diodes and method of producing said material
JP5259770B2 (en) * 2011-05-02 2013-08-07 株式会社東芝 Method for producing red phosphor
JP5866870B2 (en) * 2011-08-26 2016-02-24 三菱化学株式会社 Light emitting device
WO2013069693A1 (en) * 2011-11-07 2013-05-16 独立行政法人物質・材料研究機構 Phosphor, production method therefor, light emission device, and image display device
WO2013102222A1 (en) 2011-12-30 2013-07-04 Intematix Corporation Nitride phosphors with interstitial cations for charge balance
US8663502B2 (en) 2011-12-30 2014-03-04 Intematix Corporation Red-emitting nitride-based phosphors
US8597545B1 (en) 2012-07-18 2013-12-03 Intematix Corporation Red-emitting nitride-based calcium-stabilized phosphors
CN104583365B (en) * 2012-07-18 2016-05-11 英特曼帝克司公司 Based on the red emitting phosphor of nitride
CN103843163A (en) 2012-03-30 2014-06-04 三菱化学株式会社 Semiconductor light-emitting device and illumination device
WO2013175336A1 (en) 2012-05-22 2013-11-28 Koninklijke Philips N.V. New phosphors, such as new narrow-band red emitting phosphors, for solid state lighting
CN104080886B (en) * 2012-06-27 2017-05-24 国立研究开发法人物质·材料研究机构 Phosphor, method for producing same, light emitting device, and image display device
WO2014017613A1 (en) * 2012-07-25 2014-01-30 独立行政法人物質・材料研究機構 Fluorophore, method for producing same, light-emitting device using fluorophore, image display device, pigment, and ultraviolet absorbent
US8679367B2 (en) * 2012-08-09 2014-03-25 Intematix Corporation Green-emitting (oxy)nitride-based phosphors and light-emitting device using the same
TWI568832B (en) * 2012-10-18 2017-02-01 晶元光電股份有限公司 A compound of phosphor and the manufacturing method thereof
CN102925153B (en) * 2012-11-23 2014-01-15 中国科学院长春光学精密机械与物理研究所 Color-adjustable single-phase fluorescent material and application thereof
JP2014177592A (en) * 2013-03-15 2014-09-25 Toshiba Corp Phosphor and light-emitting device using the same
JP2014181260A (en) * 2013-03-18 2014-09-29 Toshiba Corp Phosphor, light-emitting device and method for producing phosphor
KR102075989B1 (en) 2013-06-20 2020-02-11 삼성전자주식회사 Red phosphor, light emitting device, display apparatus and illumination apparatus
JP6596495B2 (en) 2014-11-14 2019-10-23 ルミレッズ ホールディング ベーフェー LED phosphor containing bow-tie shaped A2N6 building block
JP6418208B2 (en) * 2016-08-24 2018-11-07 日亜化学工業株式会社 Nitride phosphor and light emitting device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006016413A (en) 2004-06-30 2006-01-19 National Institute For Materials Science Phosphor and luminescent implement
US20060065878A1 (en) 2004-08-27 2006-03-30 Dowa Mining Co., Ltd. Phosphor and manufacturing method for the same, and light source
WO2006117984A1 (en) 2005-04-27 2006-11-09 Nichia Corporation Nitride phosphor and light-emitting device using same

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242221A (en) * 1977-11-21 1980-12-30 General Electric Company Ceramic-like scintillators
US6278832B1 (en) * 1998-01-12 2001-08-21 Tasr Limited Scintillating substance and scintillating wave-guide element
US6680569B2 (en) * 1999-02-18 2004-01-20 Lumileds Lighting U.S. Llc Red-deficiency compensating phosphor light emitting device
JP4683719B2 (en) * 2000-12-21 2011-05-18 株式会社日立メディコ Oxide phosphor, radiation detector using the same, and X-ray CT apparatus
DE10147040A1 (en) * 2001-09-25 2003-04-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lighting unit with at least one led as a light source
RU2242545C1 (en) * 2003-11-04 2004-12-20 Загуменный Александр Иосифович Scintillation substance (options)
TWI359187B (en) * 2003-11-19 2012-03-01 Panasonic Corp Method for preparing nitridosilicate-based compoun
JP3837588B2 (en) 2003-11-26 2006-10-25 三菱化学株式会社 Phosphors and light emitting devices using phosphors
WO2005083037A1 (en) 2004-02-20 2005-09-09 Philips Intellectual Property & Standards Gmbh Illumination system comprising a radiation source and a fluorescent material
US7229573B2 (en) * 2004-04-20 2007-06-12 Gelcore, Llc Ce3+ and Eu2+ doped phosphors for light generation
JP2005336450A (en) * 2004-04-27 2005-12-08 Matsushita Electric Ind Co Ltd Phosphor composition, method for producing the same and light-emitting device using the same phosphor composition
KR101157313B1 (en) * 2004-04-27 2012-06-18 파나소닉 주식회사 Phosphor composition and method for producing the same, and light-emitting device using the same
JP4674348B2 (en) 2004-09-22 2011-04-20 独立行政法人物質・材料研究機構 Phosphor, method for producing the same, and light emitting device
WO2006093011A1 (en) * 2005-03-01 2006-09-08 Kabushiki Kaisha Toshiba Light emission device
CN100432184C (en) * 2005-03-25 2008-11-12 上海师范大学 Preparation of visible light -initiated nano superlong-persistence luminescent materials
JP4760082B2 (en) * 2005-03-25 2011-08-31 日亜化学工業株式会社 Light emitting device, phosphor for light emitting element, and method for manufacturing the same
US7445730B2 (en) * 2005-03-31 2008-11-04 Dowa Electronics Materials Co., Ltd. Phosphor and manufacturing method of the same, and light emitting device using the phosphor
EP1878778A4 (en) * 2005-03-31 2012-04-04 Mitsubishi Chem Corp Fluorescent substance, fluorescent substance sheet and process for producing the same, and luminescent device using said fluorescent substance
JP5066786B2 (en) * 2005-04-27 2012-11-07 日亜化学工業株式会社 Nitride phosphor and light emitting device using the same
JP4932248B2 (en) * 2005-12-21 2012-05-16 Necライティング株式会社 Yellow light emitting phosphor, white light emitting element using the same, and illumination device using the same
JP4228012B2 (en) * 2006-12-20 2009-02-25 Necライティング株式会社 Red light emitting nitride phosphor and white light emitting device using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006016413A (en) 2004-06-30 2006-01-19 National Institute For Materials Science Phosphor and luminescent implement
US20060065878A1 (en) 2004-08-27 2006-03-30 Dowa Mining Co., Ltd. Phosphor and manufacturing method for the same, and light source
WO2006117984A1 (en) 2005-04-27 2006-11-09 Nichia Corporation Nitride phosphor and light-emitting device using same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN101631843A (en) 2010-01-20
RU2459855C2 (en) 2012-08-27
BRPI0807118A2 (en) 2014-04-08
JP2010518194A (en) 2010-05-27
RU2009133333A (en) 2011-03-20
KR20090128408A (en) 2009-12-15
TW200902684A (en) 2009-01-16
CN101631843B (en) 2015-04-08
WO2008096300A1 (en) 2008-08-14
US20100133469A1 (en) 2010-06-03
US8153025B2 (en) 2012-04-10
US20120194060A1 (en) 2012-08-02
EP2109652A1 (en) 2009-10-21
US8409472B2 (en) 2013-04-02

Similar Documents

Publication Publication Date Title
Xia et al. Recent developments in the new inorganic solid-state LED phosphors
Song et al. Highly efficient and stable narrow-band red phosphor Cs2SiF6: Mn4+ for high-power warm white LED applications
KR101772352B1 (en) Luminescent material, method for producing a luminescent material and use of a luminescent material
US9944849B2 (en) Light emitting diode device with luminescent material
JP5847908B2 (en) Oxycarbonitride phosphor and light emitting device using the same
US8709838B2 (en) Method for preparing a β-SiAlON phosphor
US20160111609A1 (en) Conversion LED with High Color Rendition Index
KR101495330B1 (en) Nitride-based red-emitting phosphors in RGB (red-green-blue) lighting systems
RU2422945C2 (en) Fluorescent illumination, generating white light
KR102055115B1 (en) Method for producing phosphor
EP1710291B1 (en) Light-emitting device and illumination apparatus
US20170321866A1 (en) Sintered phosphor, light emitting device, illumination device, vehicle headlamp, and method for manufacturing sintered phosphor
JP5779651B2 (en) Silicon Carbidonitride-based phosphor and light emitting device using the same
CN101631843B (en) Red emitting luminescent materials
JP4362625B2 (en) Method for manufacturing phosphor
US8512599B2 (en) Carbonitride based phosphors and light emitting devices using the same
Xie et al. Strong green emission from α-SiAlON activated by divalent ytterbium under blue light irradiation
TWI443854B (en) Illumination system comprising a yellow green-emitting luminescent material
Dierre et al. Blue emission of Ce 3+ in lanthanide silicon oxynitride phosphors
US8339025B2 (en) Luminescent ceramic and light-emitting device using the same
JP4565141B2 (en) Phosphors and light emitting devices
JP2015134919A (en) Illumination system comprising radiation source and fluorescent material
Tang et al. Composite phase ceramic phosphor of Al 2 O 3-Ce: YAG for high efficiency light emitting
Wang et al. Structure, Luminescence, and Application of a Robust Carbidonitride Blue Phosphor (Al1–x Si x C x N1–x: Eu2+) for Near UV-LED Driven Solid State Lighting
EP1854339B1 (en) Illumination system comprising a green-emitting ceramic luminescence converter

Legal Events

Date Code Title Description
AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

17P Request for examination filed

Effective date: 20090907

17Q First examination report despatched

Effective date: 20100115

DAX Request for extension of the european patent (deleted)
RAP1 Rights of an application transferred

Owner name: PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH

Owner name: PHILIPS LUMILEDS LIGHTING COMPANY LLC

Owner name: KONINKLIJKE PHILIPS N.V.

INTG Intention to grant announced

Effective date: 20170727

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 934019

Country of ref document: AT

Kind code of ref document: T

Effective date: 20171015

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602008052348

Country of ref document: DE

RAP2 Rights of a patent transferred

Owner name: LUMILEDS HOLDING B.V.

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20171004

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 934019

Country of ref document: AT

Kind code of ref document: T

Effective date: 20171004

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180104

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180204

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180104

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20180105

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 602008052348

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

REG Reference to a national code

Ref country code: FR

Ref legal event code: CA

Effective date: 20180628

Ref country code: FR

Ref legal event code: TP

Owner name: LUMILEDS HOLDING B.V., NL

Effective date: 20180628

26 Opposition filed

Opponent name: MOLNIA, DAVID

Effective date: 20180704

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20180131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

RAP2 Rights of a patent transferred

Owner name: LUMILEDS HOLDING B.V.

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: FR

Payment date: 20190128

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

REG Reference to a national code

Ref country code: DE

Ref legal event code: R100

Ref document number: 602008052348

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20180131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

27O Opposition rejected

Effective date: 20191130

PGFP Annual fee paid to national office [announced from national office to epo]

Ref country code: DE

Payment date: 20200228

Year of fee payment: 13

Ref country code: GB

Payment date: 20200129

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20171004

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20080131